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EP1665483B1 - Dispositif pour surveiller le courant de fuite d'un parafoudre - Google Patents

Dispositif pour surveiller le courant de fuite d'un parafoudre Download PDF

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Publication number
EP1665483B1
EP1665483B1 EP04786839A EP04786839A EP1665483B1 EP 1665483 B1 EP1665483 B1 EP 1665483B1 EP 04786839 A EP04786839 A EP 04786839A EP 04786839 A EP04786839 A EP 04786839A EP 1665483 B1 EP1665483 B1 EP 1665483B1
Authority
EP
European Patent Office
Prior art keywords
circuit
arrester
leakage current
evaluation circuit
filter arrangement
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04786839A
Other languages
German (de)
English (en)
Other versions
EP1665483A1 (fr
Inventor
Haiko Schillert
Matthias Schubert
Kai Steinfeld
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of EP1665483A1 publication Critical patent/EP1665483A1/fr
Application granted granted Critical
Publication of EP1665483B1 publication Critical patent/EP1665483B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01C—RESISTORS
    • H01C7/00—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material
    • H01C7/10—Non-adjustable resistors formed as one or more layers or coatings; Non-adjustable resistors made from powdered conducting material or powdered semi-conducting material with or without insulating material voltage responsive, i.e. varistors
    • H01C7/12—Overvoltage protection resistors
    • H01C7/126—Means for protecting against excessive pressure or for disconnecting in case of failure
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
    • H02H3/02—Details
    • H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
    • H02H3/048—Checking overvoltage diverters

Definitions

  • the invention relates to a device for monitoring the leakage current of a surge arrester according to the preamble of the main claim.
  • Surge arresters for electrical power transmission systems are extremely reliable devices, but there is still often the desire to monitor the operating state of the arrester. This is particularly the case when the equipment, for example by design or environmental conditions unusually sharp claimed or installed on particularly important network points, such as machine transformers or strategically important substations.
  • the user would like to be able to detect at an early stage by monitoring devices whether the arrester is capable of reliably dissipating overvoltages with the specified energy content at any time or whether the arrester is damaged and threatens failure.
  • a monitoring device for a surge arrester is known.
  • the monitoring device is supplied from an external power supply device.
  • the voltage supplied by this external energy supply device is synchronized with the mains voltage of the surge arrester in order to ensure monitoring of the surge arrester.
  • a surge arrester which has a device which monitors the Ableitteraging.
  • a leakage current monitor detects the leakage current of the surge arrester.
  • the number of discharges of the surge arrester is monitored. With the achievement of a predetermined number of Ableitvor réellen be emitted correspondingly different color flares.
  • devices for monitoring a surge arrester are known from the patent abstracts of Japan JP 09145759 A and JP 2000321318 A.
  • a computer unit For this purpose, for example, a Fourier transformation is performed.
  • the result of the analysis is displayed in a display device.
  • a monitoring device for the inspection of a surge arrester is known.
  • a transducer is inserted in the grounding current path of a surge arrester.
  • the earth connection forms the primary winding.
  • the transducer is with fed an inspection current from an external AC source.
  • a device for monitoring a leakage current of a surge arrester is known.
  • the leakage current of the surge arrester is monitored by means of a detection device.
  • a resistive component is calculated out by means of a computing unit. This resistive portion of the leakage current is used to diagnose the state of the surge arrester.
  • the zinc oxide material used for metal oxide arresters has a voltage-dependent non-linear conductivity which, when a sinusoidal voltage is applied, leads to the formation of a third harmonic component in the resistive leakage current of the arrester. If the resistive component of the leakage current increases, for example due to degradation, this means a shift into the range of changed nonlinearity of the characteristic curve and thus a further increase in the proportion of the third harmonic component. Therefore, methods are known in which a third harmonic analysis of the leakage current is performed. For this purpose, the leakage current is usually coupled out via a measuring element and passed through a filter arrangement, via which the third harmonic component is filtered out and evaluated with respect to its amplitude.
  • the invention is therefore based on the object, a device for monitoring the leakage current of a surge arrester using the third harmonic harmonic to take the leakage current, in which no auxiliary power for the supply of the components is required, the measurement results are easy to evaluate and which is inexpensive to manufacture, so that a permanent monitoring fixed to the arrester is possible.
  • the filter arrangement is connected to an evaluation circuit of the third harmonic, optionally emits at least one warning signal to a connected to the evaluation circuit display device and that in the Ableitstrom Vietnamese a transformer is connected via which the energy for a voltage supply of the filter assembly and the evaluation circuit is uncoupled, no auxiliary power for the electronic components is required, ie the latter are leakage-current-fed and no user-dependent misinterpretation is possible, and there are only lesser demands on the qualification of the user since the result of the monitoring is displayed.
  • the device can be made of standard electronic components, which makes it inexpensive. The device can therefore be permanently installed on the arrester for continuous monitoring.
  • a measuring resistor can be used in an advantageous manner, but it is also the use of a current compensator comprehensive current-compensated coil arrangement possible.
  • an active bandpass with a frequency of 150 Hz and as evaluation a microprocessor can be used.
  • the microprocessor be replaced by a simple discrete or integrated threshold switch.
  • the display device has one or more LEDs, wherein for the simplified version with the threshold switch only one LED is providable, indicating the exceeding of a predetermined threshold, but in a particularly advantageous manner are three LEDs in the colors of a traffic light with the Microprocessor connected, which indicate the flawless, the critical and the faulty operation. It is particularly advantageous to connect in the leakage circuit a coil arrangement with toroidal core and two windings wound around the toroidal core whose terminals are led to the outside, since in the critical case, i. If the evaluation circuit emits a warning signal, an external measuring device can be connected, which can make a more accurate measurement and assessment of the operating state.
  • the device shown in FIG. 1 for monitoring the leakage current has a metal oxide arrester 1 with a protective spark gap 2 for leakage currents and the actual leakage current branch 3.
  • the facility includes in addition to the Arrester 1 three circuit units, a power supply unit 4, a sampling circuit 5 for the third harmonic harmonic and an evaluation unit 6.
  • the sampling circuit 5 has a switched into the leakage current branch 3 measuring resistor 7 and an active bandpass filter 8 with a center frequency of 150 Hz.
  • a coil assembly 9 is arranged, which has a toroidal core 10 and two wound around the toroidal coil 11, wherein the terminals of the coils for connection to an external measuring instruments are led to the outside.
  • the evaluation unit 6 consists essentially of a microprocessor circuit 12 and three LEDs 13, 14, 15, which are selected in the embodiment in the colors of a traffic light, namely green, yellow and red.
  • a traffic light namely green, yellow and red.
  • other light sources can be used in principle, and optionally also one or more acoustic display elements are conceivable instead of the optical display elements.
  • the power supply unit 4 comprises a transformer 16, the primary winding 17 is connected in the leakage current branch 3 and the secondary winding 18 is connected to a power supply 19 with rectification circuit and filter circuit.
  • the bandpass 8 and the microprocessor circuit 12 are connected to the outputs of the power supply 19 for their power supply.
  • the auxiliary power is coupled out floating from the current flowing in the leakage current branch 3 leakage current, the secondary coil 18 provides an alternating current to the power supply 19.
  • the power supply performs a rectification and a screening and provides at its output a positive and a negative DC voltage with corresponding zero potential.
  • the leakage current is sampled by the measuring resistor 7 and supplied to the active bandpass 8, which outputs the third harmonic filters out the sampled leakage current.
  • the microprocessor circuit 12 evaluates the third harmonic according to the magnitude of its peak value and drives the LEDs 13 to 15. To this end, the microprocessor circuit 12 includes three thresholds, where at a peak below a first threshold, normal operation with a green LED 13, a peak above the first threshold but below the second threshold as a critical area, with a yellow LED 14, and a peak above the second threshold indicate a faulty operation with a red LED.
  • the coil arrangement 9 which can be switched as a current-compensated coil, merely serves as an additional sensor for an external measuring device for the precise compensated measurement of the third harmonic, if, for example, the yellow LED 14 is flashing.
  • a further embodiment of a sampling circuit 5 is shown, which can be used instead of the sampling circuit of FIG. 1, that is, the measuring resistor 7 of FIG. 1 is replaced by a current-compensated coil assembly comprising a toroidal core 20 with two coils 21, 22 and a connected to the terminals of the coils 21, 22 current compensator 23 has.
  • the total magnetic field of the coil arrangement is made zero by a countercurrent, so that the measuring voltage is available at the output of the current compensator 23.
  • the active bandpass 8 in turn filters out the third harmonic.
  • Fig. 3 a variant of the evaluation unit 6 is shown, in which the microprocessor circuit 12 is replaced by a simple threshold value switch 24, which has only a threshold value for the display of the critical operating range.
  • a simple threshold value switch 24 which has only a threshold value for the display of the critical operating range.
  • the coil assembly 9 may additionally be present in all embodiments.

Landscapes

  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Measurement Of Current Or Voltage (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
  • Emergency Protection Circuit Devices (AREA)

Claims (11)

  1. Dispositif de surveillance du courant de fuite d'un parafoudre (1), comprenant un élément (7) de mesure pour détecter le courant de fuite passant dans le circuit (3) du courant de décharge et un dispositif fuite de filtre pour filtrer le troisième harmonique du courant de fuite qui est une mesure de l'état de fonctionnement du parafoudre (1), le dispositif fuite de filtre étant relié à un circuit (12-14) d'évaluation du troisième harmonique
    caractérisé
    en ce que, le cas échéant, au moins un signal d'avertissement est émis sur un dispositif (13-14-15-25) d'indication raccordé au circuit (12-24) d'évaluation et
    en ce que, dans le circuit (3) de courant de décharge, est monté un transformateur par lequel l'énergie pour une alimentation à tension du dispositif (8) de filtre et du circuit (12-14) d'évaluation peut être découplé.
  2. Dispositif suivant la revendication 1, caractérisé en ce qu'un roulement (17) primaire du transformateur (16) se trouve dans le circuit (3) du courant de décharge et un roulement (18) secondaire est relié à un circuit (19) redresseur qui est relié au dispositif (8) de filtre et au circuit (12-14) d'évaluation.
  3. Dispositif suivant la revendication 1 ou 2, caractérisé en ce que l'élément de mesure est une résistance (7) de mesure.
  4. Dispositif suivant la revendication 1 ou 2, caractérisé en ce que l'élément.de mesure est un dispositif à bobine compensé en courant et comprenant un compensateur (23) de courant, ce compensateur (23) de courant étant relié au dispositif (8) de filtre et au circuit redresseur.
  5. Dispositif suivant la revendication 1 à 4, caractérisé en ce que le dispositif de filtre comprend un passe-bande (8) actif.
  6. Dispositif suivant l'une des revendications 1 à 5,caractérisé en ce que le circuit d'évaluation comprend un circuit (12) à micro-processeur qui évalue les valeurs de crête du troisième harmonique et émet au moins un signal d'avertissement.
  7. Dispositif suivant l'une des revendications 1 à 5, caractérisé en ce que le circuit d'évaluation est un circuit (24) à valeur de seuil, qui émet un signal d'avertissement lorsqu'un seuil est dépassé.
  8. Dispositif suivant l'une des revendications 1 à 7,
    caractérisé en ce que le dispositif d'indication est du type optique ou acoustique.
  9. Dispositif suivant l'une des revendications 1 à 8, caractérisé le dispositif d'indication comprend au moins une LED (13,14,15,25).
  10. Dispositif suivant l'une des revendications 1 à 9, caractérisé en ce que le dispositif d'indication comprend plusieurs LED (13,14,15) et en ce que le circuit (12) d'évaluation commande des diodes électro-luminescentes différentes,en fonction de l'amplitude des valeurs de crête
  11. Dispositif suivant l'une des revendications 1 à 10, caractérisé en ce que dans le circuit (3) de courant de décharge est monté un dispositif (9) à bobine munie d'un noyau (10) annulaire et de deux bobines (11) enroulées sur le noyau (10) annulaire, les bornes des bobines étant guidées vers l'extérieur, pour la liaison avec un appareil extérieur de mesure dans le cas de la présence d'un signal d'avertissement.
EP04786839A 2003-09-25 2004-09-16 Dispositif pour surveiller le courant de fuite d'un parafoudre Expired - Lifetime EP1665483B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10345658A DE10345658B3 (de) 2003-09-25 2003-09-25 Einrichtung zur Überwachung des Leckstroms eines Überspannungsableiters
PCT/DE2004/002123 WO2005031931A1 (fr) 2003-09-25 2004-09-16 Dispositif pour surveiller le courant de fuite d'un parafoudre

Publications (2)

Publication Number Publication Date
EP1665483A1 EP1665483A1 (fr) 2006-06-07
EP1665483B1 true EP1665483B1 (fr) 2007-01-24

Family

ID=34384340

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04786839A Expired - Lifetime EP1665483B1 (fr) 2003-09-25 2004-09-16 Dispositif pour surveiller le courant de fuite d'un parafoudre

Country Status (11)

Country Link
US (1) US7336193B2 (fr)
EP (1) EP1665483B1 (fr)
CN (1) CN100483874C (fr)
AU (1) AU2004276877B2 (fr)
BR (1) BRPI0414652A (fr)
CA (1) CA2539964A1 (fr)
DE (2) DE10345658B3 (fr)
ES (1) ES2281018T3 (fr)
MX (1) MXPA06003115A (fr)
RU (1) RU2340058C2 (fr)
WO (1) WO2005031931A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106597229A (zh) * 2013-05-07 2017-04-26 陈国栋 35kV以上变电设备绝缘在线监测系统的工作方法

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US8799831B2 (en) * 2007-05-24 2014-08-05 Applied Materials, Inc. Inline defect analysis for sampling and SPC
US8924904B2 (en) * 2007-05-24 2014-12-30 Applied Materials, Inc. Method and apparatus for determining factors for design consideration in yield analysis
CA2609619A1 (fr) * 2007-09-10 2009-03-10 Veris Industries, Llc Indicateur d'etat
EP2333925B1 (fr) 2009-12-08 2013-02-13 Raychem International Surveillance de conditions de coupe-circuit de surtension
EP2392934B1 (fr) * 2010-06-02 2019-02-06 Omicron Energy Solutions GmbH Procédé et dispositif de surveillance d'un parafoudre d'un système de câble
CN102721850A (zh) * 2012-06-08 2012-10-10 上海市电力公司 一种氧化锌避雷器阻性电流的基波分量的测量方法
GB201311918D0 (en) * 2013-07-03 2013-08-14 Cooper Technologies Co Voltage-limiter monitoring
CN105474492B (zh) * 2013-08-08 2019-03-12 施耐德电气美国股份有限公司 电路保护设备故障诊断翻译器
US9978270B2 (en) 2014-07-28 2018-05-22 Econolite Group, Inc. Self-configuring traffic signal controller
CN105044524B (zh) * 2015-08-10 2018-12-04 许继集团有限公司 一种适用于智能变电站的避雷器监测方法及系统
DE102015116084B3 (de) * 2015-09-23 2016-10-06 Hochschule Konstanz Strommessvorrichtung
US10209293B2 (en) * 2016-07-12 2019-02-19 Electric Power Research Institute, Inc. Sensor to monitor health of metal oxide arresters
EP3503331B1 (fr) * 2017-12-21 2022-09-14 Tyco Electronics UK Ltd Procédé de surveillance à distance de sectionneurs de limiteur de surtension défaillants et dispositif de collecte d'énergie pour l'alimentation autonome de dispositifs de surveillance installées sur des limiteurs de surtension
CN109193603B (zh) * 2018-10-12 2023-08-18 柳州辰天科技有限责任公司 一种带监测功能的防雷补偿器及其监测方法
CN110146771A (zh) * 2019-05-22 2019-08-20 广东锦煜智能科技有限公司 一种漏电侦测警示系统以及漏电侦测警示设备
RU192715U1 (ru) * 2019-05-30 2019-09-26 Общество с ограниченной ответственностью "Челэнергоприбор" Устройство для контроля тока утечки ограничителя перенапряжения
KR102068028B1 (ko) * 2019-06-17 2020-01-20 한국수자원공사 피뢰기 저항성 누설전류 검출 장치 및 검출 방법
CN111611132B (zh) * 2020-05-20 2023-09-05 中国移动通信集团江苏有限公司 面向业务的运维分析方法、装置、设备及介质
CN115932648B (zh) * 2022-12-30 2024-02-02 西安远测电力科技有限公司 一种监测避雷器阻性电流的无线智能传感器装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106597229A (zh) * 2013-05-07 2017-04-26 陈国栋 35kV以上变电设备绝缘在线监测系统的工作方法
CN106707007A (zh) * 2013-05-07 2017-05-24 陈国栋 变电设备绝缘在线监测系统的工作方法
CN106707007B (zh) * 2013-05-07 2019-03-19 国网内蒙古东部电力有限公司 变电设备绝缘在线监测系统的工作方法
CN106597229B (zh) * 2013-05-07 2019-11-15 陈国栋 35kV以上变电设备绝缘在线监测系统的工作方法

Also Published As

Publication number Publication date
CN1856916A (zh) 2006-11-01
WO2005031931A1 (fr) 2005-04-07
MXPA06003115A (es) 2006-06-20
EP1665483A1 (fr) 2006-06-07
AU2004276877B2 (en) 2009-05-28
RU2340058C2 (ru) 2008-11-27
US20060203412A1 (en) 2006-09-14
US7336193B2 (en) 2008-02-26
CN100483874C (zh) 2009-04-29
AU2004276877A1 (en) 2005-04-07
CA2539964A1 (fr) 2005-04-07
RU2006113940A (ru) 2007-10-27
DE10345658B3 (de) 2005-04-28
BRPI0414652A (pt) 2006-11-21
ES2281018T3 (es) 2007-09-16
DE502004002807D1 (de) 2007-03-15

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